28193865

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 53187840

約数和(自身を除く): 24993975

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 89, 105, 147, 245, 267, 431, 445, 623, 735, 1293, 1335, 1869, 2155, 3017, 3115, 4361, 6465, 9051, 9345, 13083, 15085, 21119, 21805, 38359, 45255, 63357, 65415, 105595, 115077, 191795, 268513, 316785, 575385, 805539, 1342565, 1879591, 4027695, 5638773, 9397955, 28193865]

約数ペア:

[(1, 28193865), (3, 9397955), (5, 5638773), (7, 4027695), (15, 1879591), (21, 1342565), (35, 805539), (49, 575385), (89, 316785), (105, 268513), (147, 191795), (245, 115077), (267, 105595), (431, 65415), (445, 63357), (623, 45255), (735, 38359), (1293, 21805), (1335, 21119), (1869, 15085), (2155, 13083), (3017, 9345), (3115, 9051), (4361, 6465)]